Improvement in miter-boxes



NirEn ATENT rricE.

DANIEL HOVELL, JR., AND MOSES K. KELLAM, OF NEW YORK, N. Y.

lMPROVEMENT IN MITEPt-BOXES.

Specitication forming part of Letters Patent No. 12,52, dated May 3, 1864.

To all whom it may concern.-

Be it known that we, DANIEL HOWELL, Jr., and MosEs K. KELLAM, of the city, county, and State of New York, have invented new and useful Improvements in the Miter and Adjustable Bevel-Jack for Carpenters Use; and we hereby declare that the following is a full and exact description thereof.

To enable others skilled in the business to make and use our invention, we will proceed to describe its construction and operation, reference being had to the drawings hereunto annexed, and making part of this specification.

Figure l is a front elevation; Fig. 2, a top view 5 Fig. 3, a plan of the iron frame or bed; Fig. 4, a plan of combined arm, Fig. 5, an elevation of the stock or frame of the beveljack without the works, but clothed with the wood projections F and D; Fig. 6, an elevation of the same with the works inserted; Fig. 7, a plan of the complete instrument, the connectingstrips H and I partially concealed, but shown clearly in Fig. 4 instead.

The same letters refer to the same things in all the designs.

A is the stock or iron frame; B, the arms at the middle part; C, the arms outside; D, the bed-board 5 E, the upright part of the frame; F, the facing-board; Gr, the gagingrollers 5 H, the outer pair of the combined arms; I, the inner pair of arms; J,a setserew under each ot' the arms H and I, Fig. 6; K, quadrants marking degrees of a circle to guide the operator in arranging angles, there being an indicator or point on the arm for the purpose.

The purpose of our invention is to provide for ship-joiners especially, and carpenters in general, a miter and adjustable jack that can be readily set to any angle for the joints of moldings, Ste., and that will be a convenient and durable implement for their use.

XVe make the baseA of castfiron,and upon it pivot the arms B and G and H and I, that hold the perpendicular elastic rollers. If to act singly, we pivot them at the end at the rear. It' to act together, to produce oppositelycorresponding angles, we pivot them at or nea-r the center, and then unite their action by cross-rods. The two middle arms, I, would act together, and the two outer ones, H, together. Thus all angles could be readily formed. Upon the iron bed we lay a strip of wood, D, to which the saw will reach in cutting an angle. The strip is easily renewable. Upon the uprights E we put a facing of wood, F, that the saw may not touch iron, and to set the miter exact. The facing is held by a thumb-screw at the back of the uprights, to slide. The upright rollers G are the guides of the saw to make the cut perpendicular. They are clothed with indiarubber to be easy to the side of the sawteeth.

To operate the bevel-jack to cut the desired angle, the arms H, Fig. 7, are moved until the index points to the proper degree, and then the set-screw J is turned to tix it. The opposite arm will be at the same angle for cutting the opposite piece. The use of the other pair of arms, I, Fig. 7, is to eut peculiar angles-for instance, those of a rhomb. If the arms H be set so that the guides will hold the saw to an angle of thirty degrees,

the arms I can beset, at the same gure, thirty degrees on the quadrant to produce the obtuse angles of the rhomb, the numbers on the scale for this purpose heilig reversed, the one degree beginning at top and the other at the bottom of the quadrant.

What we claim as our invention, and desire to secure by Letters Patent, is-

1. The combination of the upright gagingrollers upon adjustablearms B and G, with the facing-boardF and the bed-board, to make an adjustable bevel-jack, in the manner substantially. as above described.

2. The construction ot' the combined arms H and I, Fig. 4,1late I, to form the proper oppositeangles for sawing the moldings of any regular iigure, in the manner described.

DMNIEL HOWELL, JR. MOSES K. KELLAM.

Witnesses:

OWEN G. WARREN, J. l). STURTEvANT. 

